Armature for electric motors and generators.



PATENTED OCT. 20, 1903. C. D. KNIGHT. ARMATURE FOR ELECTRIC MOTORS AND GENERATORS.

APPLICATION FILED JAN. 2, 1903.

N0 MODEL.

n ri IIH No. 741,676. Patented October 20, 1903.

UNITED STATES PATENT OFFICE.

CHARLES D. KNIGHT, OF MILIVAUKEE, IVISCONSIN, ASSIGNOR TO NATIONAL ELECTRIC COMPANY, OF IVIILIVAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

ARMATURE FOR ELECTRlC MOTORS AND GENERATORS.

SPECIFICATION forming part of Letters Patent No. 741,676, dated October 20, 1903.

Application filed January 2,1903. Serial No. 137,472. (No model.)

To a. whom it may concern.- ff are flanges fitted on the hub or sleeve a Be it known that I, CHARLES D. KNIGHT, a against its shoulders I) and secured thereon citizen of the United States, residing at Milby keys or other means. These flanges are waukee, in the county of Milwaukee and State made to extend over and embrace the ends of 5 of Wisconsin, have invented certain new and the core and are formed on their inner faces 55 useful Improvements in Armatures for Elecwith radiating grooves or air-passages g. tric Motors and Generators, of which the folh 71 are dovetailed keys fitted to engage the lowing is a specification, reference being had grooves in the laminae core and formed with to the accompanying drawings,forming a part reduced threaded ends, which are secured by thereof. nuts t' in the flanges f, the shoulders next to 60 The main objects of this invention are to the reduced ends of the keys abutting against facilitate the construction and assemblage of the inner faces of the flanges. The core is the component parts of an armature and to thus clamped between the flanges. The segprovide for thorough ventilation of the core ments of the lamina; are held in place by the and windings. keys against displacement by centrifugal 65 It consistsin certain novel features of conforce, and the parts of the armature are sestruction and in the arrangement and combicurely bound together, leaving a clear space nations of parts, hereinafter particularly debetween the hub and the core for the passage scribed, and pointed out in the claims. of air through openings j in the flanges to the In the accompanying drawings like letters ventilating-spaces candg through and out the 70 designate the same parts in the several figends of the core. ures. To facilitate the construction and assem- Figure l is an end elevation, certain parts blage of the parts of the armature, the spacbeing broken away and shown in section, of ing-rings (Z are made in segments connected an armature embodying my improvements. at the ends by dovetailed tongues and ten- 75 Fig. 2 is alongitudinal section on the line 2 2, ons, as shown in Figs. 1 and 3, and each com- Fig. 1; and Figs. 3 and at are detailed views posed of radiating bars 7r, connected by a of the adjoining ends of segments of a spacthin arc-shaped band Z. ing-ring, Fig. 3 being an end view and Fig. i In building up the laminte core one of the an edge or face view. flanges, with the keys h secured therein, is 80 a is the hub or sleeve, which is fitted and placed in a horizontal position, with the keys adapted to be secured by a key or other projecting upwardly, and the laminae for the means on the armature-shaft. It is preferseveral layers of the core are dropped into ably reduced in diameter at or near the ends place in engagement with the keys, which and formed with shoulders I). are securely held by the shoulders and nuts 85 c is amannular core composed of sheet iron on their lower ends in their proper positions or steel laminae arranged in layers or groups, perpendicular to the flange, thereby greatly which are separated from each other by spacfacilitating placing the notched segments of ing-rings d to form ventilating-spaces or airthelaminze thereon. Between adjacentlayers o passages e from the inside to the outside of of laminae or sections of the core a spacing- 0 the core. The laminae of which the core is ring is assembled by simply engaging with composed are preferably made in segments, each other the grooved and tenoned ends of which are arranged to break joints with each its component segments as the core is built other in the usual way, as shown in 1. up. Each ring is held in place between the The segments of the laminae are formed inseveral groups or layers of the laminre con- 5 side with dovetailed or undercut notches centric with the axis of the armature by the which When the laminze are assembled proflanges and keys, which bind the parts to duce corresponding longitudinal grooves ingether. side of the core parallel with the axes of the To accelerate the outward current of air armature. through the ventilating-spaces in and at the I00 ends of the core, fan-blades or vanes are arranged lengthwise of the armature between the core and hub. These blades or vanes, which are made of spring sheet metal or flexible material, are attached at their outer edges to some of the keys h and are engaged at their inner edges by notches or lugs on a collar n, which is fitted to turn on the hub Ct and is adjustably connected therewith by a screw 0 engaging a nut held between lugs on the hub a. By means of this collar and its adjustable connection with a hub the curvature of the fan-blades or vanes may be reversed or adjusted to secure their most effective operation. This provision for reversing the fan-blades or vanes will be found convenient and advantageous, because it is necessary or desirable under certain conditions to turn the armature in one direction and under other conditions to turn it in the other direction, and it is not generally known or easily ascertained when the machine is made in what direction the armature will be run.

Various changes in the minor details of construction and arrangement of parts may be made within the spirit and intended scope of the invention.

I claim 1. In an armature the combination of an annular laminated core having dovetailed longitudinal grooves inside, a central hub or sleeve, flanges mounted on said hub orsleeve and embracing the ends of the core and dovetailed keys secured at the ends in said flanges in engagement with the grooves in said armature and binding the parts together, sub stantially as described.

2. In an armature the combination of an annular laminated core having dovetailed longitudinal grooves inside, a hub or sleeve, flanges mounted on said hub or sleeve and embracing the ends of the core, and dovetailed keys fitted in engagement with the grooves in said core and reduced and threaded at the ends, which are secured by nuts in said flanges, the shoulders at the inner ends of the reduced portions of the keys abutting against the inner sides of the flanges, substantially as described.

3. In an armature the combination of an annular laminated core having ventilatingspaces between groups or layers of laminze, a central hub or sleeve, flanges connecting the ends of the core with said hub or sleeve and formed with air-intake openings between the core and hub or sleeve, and reversiblevanes arranged lengthwise of the armature between the core and central hub or sleeve and between said flanges, substantially as described.

4. In an armature the combination with a laminated core of spacing-rings interposed between groups or layers of laminae, each spacing-ring being composed of segments provided at the ends with interlocking grooves and tenons, substantially as described.

5. In an armature the combination with a laminated core, of spacing-rings interposed between groups or layers of laminae and each composed of segments connected with each other at their ends by dovetailed grooves and tenons and each segment consisting of radiating bars connected by a thin arc-shaped band, substantially as described.

6. In an armature the combination of an annular laminated core having undercut longitudinal grooves inside and ventilating-spaces at intervals between groups or layers of lamina), a central hub or sleeve, flanges clamped on said hub or sleeve to the ends of said core by keys engaging the grooves in said core, flexible vanes attached at their outer edges to some of said keys, and means for bending said vanes toward their inner edges in either direction, substantially as described.

7. In an armature the combination of an annular laminated core having ventilatingspaces between the several groups or layers of laminae of which it is composed, a central hub or sleeve, flanges clamped on said hub or sleeve to the ends of the core by keys which engage undercut grooves in the inner side of the core, flexible vanes attached at theirouter edges to some of said keys, a collar mounted and capable of turning on said hub or sleeve and engaging the inner edges of said vanes, and means for adjusting said collar circumferentially on said hub or sleeve and thereby reversing the curvature of said vanes, substantially as described.

In witness whereof I hereto a'llix my signature in presence of two witnesses.

CHARLES D. KNIGHT.

Witnesses:

JOHN H. HURLEY, Amen E. Goss. 

